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CAC1818675
The only HVAC company offering a 100% Third Party
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The Truth About Fogging
Source Contaminant Removal is the Only Effective Approach
At EnviroAir Systems, we specialize in HVAC systems and indoor air quality, following the highest industry standards to ensure clean, safe air.
A common misconception in the industry is that fogging an antimicrobial solution inside air ducts is an effective way to eliminate contamination. While fogging can serve a purpose after proper cleaning, it should never be the first line of defense.
Fogging alone does not remove contaminants—it only attempts to cover them up. Think of it like spraying disinfectant on a dirty floor without sweeping and mopping first.
Physical removal is the gold standard. According to both NADCA and EPA guidelines, the most effective way to clean air ducts is through source removal—physically extracting dust, debris, and microbial contamination using mechanical agitation, HEPA vacuuming, and proper containment.
The EPA Has Not Approved Any Products for Fogging Inside HVAC Ductwork
Many fogging agents do not reach all duct surfaces evenly, and in some cases, they can introduce more contaminants into the air system rather than eliminating them.
Some Companies Use Fogging as a Shortcut
Unfortunately, some companies—even those with the proper licenses and certifications—use fogging as a shortcut to avoid the labor-intensive process of true duct cleaning and remediation. This not only violates industry best practices but can also give customers a false sense of security that their air system is clean.
EnviroAir Systems doesn’t take shortcuts. Every cleaning is done thoroughly and professionally, ensuring that air quality is genuinely improved.
Fogging Without Cleaning Can Make the Problem Worse
Many fogging products leave behind chemical residues, which can become airborne and cause respiratory irritation—especially for those with allergies, asthma, or chemical sensitivities.
If ducts aren’t properly cleaned beforehand, the fogging agent can bind contaminants to duct surfaces, potentially making removal even harder later on.
"According to both NADCA and EPA guidelines, the most effective way to clean air ducts is through source removal—physically extracting dust, debris, and microbial contamination using mechanical agitation, HEPA vacuuming, and proper containment."
According to the Environmental Protection Agency (EPA), no chemical biocide or antimicrobial product has been approved for fogging inside HVAC duct systems.
The EPA specifically advises against the use of antimicrobial sprays or fogging products in air ducts due to a lack of research on their effectiveness and the potential for harmful chemical exposure.
The EnviroAir Systems Difference
At EnviroAir Systems, we are not just a NADCA-certified company—we are also a licensed AC contractor and experts in indoor air quality.
This means we understand not just how to clean your air ducts, but how your entire HVAC system impacts the air you breathe.
At EnviroAir Systems, we don’t just mask contamination with chemicals—we thoroughly clean your system to remove pollutants at the source. The best way to begin improving your indoor air quality is with an EnviroAir Systems HVAC Inspection and Environmental Risk Assessment. Our 100% Third Party Clearance Testing Guarantee offers verified proof that you received the results you paid for.
